<!DOCTYPE html>
<html>

	<head>
		<meta charset="UTF-8">
		<title></title>
		<style>
			* {
				margin: 0;
				padding: 0;
			}
			ul {
				list-style: none;
			}
			.container {
				width: 750px;
				margin: 0 auto;
			}
			
			.container ul li {
				width: 93.75px;
				height: 30px;
				background-color: green;
				float: left;
			}
			@media only screen and (max-width: 767px) {
				.container {
					width: 100%;
				}
				.container ul li {
					width: 33.33%;
				}
			}
		</style>
	</head>

	<body>
		<div class="container">
			<ul>
				<li>导航栏</li>
				<li>efhiucfhuie</li>
				<li>figcbih</li>
				<li>dksihfv</li>
				<li>vojfhnv</li>
				<li>jhv</li>
				<li>jnhvoj</li>
				<li>jvnj</li>

			</ul>

		</div>

	</body>

</html>